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Finding the Fourth Proportional to 646,879.40, 970,664.70 and 291,948.20

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Solution

The fourth proportional to 646,879.40, 970,664.70 and 291,948.20 is: 438,078.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,879.40 : 970,664.70 = 291,948.20 : x
  2. Step 2: Convert to fraction form
    646,879.40/970,664.70 = 291,948.20/x
  3. Step 3: Cross multiply
    646,879.40x = 970,664.70 × 291,948.20
  4. Step 4: Simplify right side
    646,879.40x = 283,383,811,968.54
  5. Step 5: Solve for x
    x = 283,383,811,968.54/646,879.40
  6. Step 6: Final answer
    x = 438,078.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.